He has but one quest, that is true. But even if you fail his quest (i.e. give the jewel to the goblins), you can still upgrade one time. If you bring him the jewel, twice. So in the end, if you want, you can still upgrade twice with Radcliff.
I am in blood Stepp'd in so far, that, should I wade no more, Returning were as tedious as go o'er.
